[ Present Tenses ]
Listen! I think someone ……………….. at the door.
A. are knocking
B. has knocked
C. is knocking
D. have knocked

Random Topics:
Pronoun-Verb AgreementFrequencyPassive Voice - Present Simple and Past SimpleComparison of Adjective and AdverbIF CLAUSEComparatives - SuperlativeFuture PlansModal and Modal PerfectArticles and QuantifiersAdjective & AdverbsOther quiz:
Tenses › ViewThe manager of the company _______ they______ five new branches in the city the following month.
A. has said – would open
B. is saying – have opened
C. said – were opening
D. said – have opened
Grammar › View
______ do you visit your grandma? – Every month.
A. Why
B. How
C. How often
D. When
Grammar › View___________ two sisters.
A. I have get
B. I’ve got
C. I get
D. I got
Grammar › View
In sentences beginning with here or there, the true subject _______ the verb.
A. changes
B. omits
C. precedes
D. follows
